diff --git a/big.go b/big.go
index 3aa68bb..42c1299 100644
--- a/big.go
+++ b/big.go
@@ -944,8 +944,8 @@ func (x *Big) Precision() int {
 }
 
 // Quantize sets z to the number equal in value and sign to z with the scale, n.
-//
-// Other decimal libraries may refer to Quantize as Truncate.
+// The rounding of z is performed according to the rounding mode set in z.Context.RoundingMode.
+// In order to perform truncation, set z.Context.RoundingMode to ToZero.
 func (z *Big) Quantize(n int) *Big { return z.Context.Quantize(z, n) }
 
 // Quo sets z to x / y and returns z.